a theory predicting how and when we detect the presence of a faint stimulus ("signal") amid background stimulation ("noise"). Assumes there is no signal absolute threshold and detection depends partly on a person's experience, expectations, motivation, and level of fatigue.
Signal Detection Theory proposes that the detection of stimuli depends on both the intensity of the stimulus and the individual's psychological factors, such as motivation and expectancy. This theory suggests that perception is influenced by both the sensitivity of sensory processes and cognitive factors.
Signal Detection Theory emphasizes that personal expectations and motivations influence the level of absolute thresholds by suggesting that an individual's sensitivity to a stimulus depends on both sensory factors and decision-making processes. This theory acknowledges that psychological factors such as expectation, motivation, and attentiveness can impact an individual's ability to detect a stimulus.
The sensitivity of a signal detection system is measured by calculating d', which is a statistical measure that takes into account both the hit rate (correctly detecting a signal) and the false alarm rate (incorrectly detecting a signal). A higher d' value indicates greater sensitivity in distinguishing between signal and noise.
Feature detection theory proposes that complex stimuli are processed by first detecting and analyzing specific features or elements of the stimulus, such as lines, angles, shapes, or colors. These features are then combined to create a perception of the whole stimulus. This theory helps explain how our sensory systems can process and make sense of the vast amount of information in our environment.
Balance modulation is a theory that proposes the brain prioritizes maintaining postural stability over executing voluntary motor actions by modulating the excitability of muscle groups involved in balancing tasks. This theory suggests that the central nervous system adjusts the level of stability needed based on environmental demands and individual abilities. It is a key concept in understanding how the body regulates balance during various activities.
Iickho Song has written: 'Advanced theory of signal detection' -- subject(s): Signal detection
Signal Detection Theory proposes that the detection of stimuli depends on both the intensity of the stimulus and the individual's psychological factors, such as motivation and expectancy. This theory suggests that perception is influenced by both the sensitivity of sensory processes and cognitive factors.
Detection theory allows one to quantify the ability to discern between information bearing patterns and random patterns that causes confusion in the patterns. In electronics, detection theory is often called signal recovery.
Ralph Dieter Hippenstiel has written: 'Detection theory' -- subject(s): Mathematics, Signal processing, Electronic surveillance, Digital techniques, Signal theory (Telecommunication), Detectors, Signal detection
Signal detection theory, is a means to quantify the ability to discern between signal and noise. There are a number of determiners of how a detecting system will detect a signal, and where its threshold levels will be. When the detecting system is a human being, experience, expectations, physiological state (e.g. fatigue) and other factors can affect the threshold applied
James P. Egan has written: 'Signal detection theory and ROC-analysis' -- subject(s): Decision making, Psychometrics, Psychophysics, Sensation, Signal detection (Psychology)
Signal detection theory adds the idea that decision-making is involved in detecting signals, rather than just relying on sensory thresholds. It also considers factors like motivation, expectation, and experience in detecting and responding to signals, providing a more comprehensive understanding of how we perceive and interpret sensory information.
Harry L Van Trees has written: 'Detection, estimation, and modulation theory' -- subject(s): Signal theory (Telecommunication), Modulation theory, Electric interference, Signal processing, Estimation theory, OverDrive, Nonfiction, Science
Signal Detection Theory emphasizes that personal expectations and motivations influence the level of absolute thresholds by suggesting that an individual's sensitivity to a stimulus depends on both sensory factors and decision-making processes. This theory acknowledges that psychological factors such as expectation, motivation, and attentiveness can impact an individual's ability to detect a stimulus.
signal detection theory
AM is amplitude modulation. AM detection is the process of demodulation or recovering the information encoded in the signal through amplitude modulation. AM detection can be done through a simple diode detector which rectifies the AM signal.
Shusheng Xu has written: 'Xin hao jian ce yu gu ji' -- subject(s): Signal detection, Estimation theory